Disposable bag for vacuum cleaners



June 26, 1956 w. w. FRESCHL 2,752,086

DISPOSABLE BAG FOR VACUUM CLEANERS Filed June 9, 1954 INVENTOR.I/V/LL/AMWFPESCHL ATTORNEY United States Patent 9 nrsrosABLE BAG FORVACUUM CLEANERS William W. Freschl, Pelham, N. Y., assignor to ModernDust Bag Co., Inc., West Haverstraw, N. Y., a corps ration of New YorkApplication June 9, 1954, Serial No. 435,478

Claims. ((1229-55) The invention relates to filter bags of speciallyprepared paper and such as are commonly utilized in connection withcollection of dust in the use of well known so-called tank or canistertype (or cylindrical) vacuum cleaners. As is well understood, such bagsare disposable after a period of use and must be replaced at frequentintervals, depending on the frequency of use of the cleaner. Bags ofthis nature are sold in large quantities and are designed to meet thevarious sizes (openings) of tank of the cleaners olfered by differentmanufacturers. While the variation in size required may not be verylarge, yet it requires that different bag sizes be made available.

It is an object of the present invention to provide a bag for use, withthe aforesaid types of vacuum cleaners, which is adjustable readily toall tank openings, so that but one size bag need be stocked by adistributor, and as Well a savings in the manufacture thereof beeffected.

A further object of the invention is to provide a disposable bag whichdoes not involve in its manufacture die-cutting of the seating memberthereof with consequent waste of material; also, which requires nosewing operations.

A still further object of the invention is to provide a novel bag withadjustable mouth and which will admit of compact folding, wherebystoring and shipment thereof are facilitated.

In carrying out the invention, the novel bag, which is designed fortemporary use only, is constructed of suitable filter material and isprovided with a mouth opening conforming to the top opening of thecleaner apparatus through which it is inserted for support by means of aflange of a seating member of novel design and pro vided on the bag tooutline generally the mouth opening of said bag. The latter is providedto this end with oppositely disposed lateral infolds extending from thebottom edge of the bag substantially to the seating member. This member,however, is not attached permanently throughout its entire length to theopen end of the bag, but is interrupted, the one end terminating at theouter line of an infold while its opposite end is detached from the bagsubstantially at the intermediate inner line of the infold to provide anunattached extension portion. This is adapted to overlap and becomesecured to the said one end when it is juxtaposed thereto, the exposedflange surface at said one end for a length bearing a pressure-sensitiveadhesive, whereby the desired adjusted opening of the bag may bemaintained.

The nature of the invention, however, will best be understood whendescribed in connection with the accompanying drawings, in which:

Fig. 1 shows in isometric projection a bag with infold spread and theseating member ends separated.

Fig. 2 is a fragmentary similar view, but with the seating memberclosed.

Fig. 3 is an end view of the bag with seating member attached thereto.

Fig. 4 is a fragmentary vertical section, taken on the line 44, Fig. 3,and looking in the direction of the arrows.

Fig. 5 is a plan view of the novel bag folded into a compact package.

Referring to the drawings, the novel dust bag comprises a containerportion 10 of the conventional material, such as a prepared, light buttough filter-type paper (36-35 lbs. per standard ream) possessing highair flow and filter properties; and a spread and supporting or seatingmember 11. The bag is provided with at least one and, preferably forcompactness and to facilitate packaging of the bag, with two lateraltucks or infold portions 12 and 13 of conventional form. Thus, the bagat opposite sides is turned inwardly along two separated fold lines 14and 15 extending from the bottom of the bag to its top edge 16, andcreased along an intermediate and inner fold line 17, likewise extendingfrom the bottom of the bag substantially to its top edge.

To extend the mouth 18 of the bag as Well as to provide a means wherebythe bag may be seated over the opening of a tank or canister (not shown)of the conventional type of vacuum cleaner, there is attached to theinside of the bag along its mouth edge 16 a more or less pliable annularseating member 20 which is sufiiciently stiff to maintain the desiredshape. For example, it may be constructed of a strip of suitablematerial such as liner board or plastic sheet. The said annular memberis provided with a flange 21 designed to extend outwardly over edge 16and thus provide a means for seating the bag. The member 20 is designedto conform the opening of mouth 18 to the desired shape for use; but, inaccordance with the invention, is not attached throughout its entirelength to the bag, nor endless. This is to afford a limited adjustmentwith respect to the mouth opening so as to accommodate a bag of one sizeto tank and like type vacuum cleaners of different sizes of mouthopening.

The said member 20 to this end may thus be secured, as by means of asuitable adhesive, from the one outer line 14 of an infold entirelyaround the opening to the intermediate line 17 of said infold only, andthe detached portion 22 of said member made of a length somewhat greaterthan half an infold or the distance of the free edge of the bag betweensaid intermediate fold line 17 and outer fold line 14. By thisexpedient, the portion 22 may overlap the juxtaposed flange portion 23at the fold line 14 which has (Fig. 2) a portion 24 thereof of theexposed surface of its flange coated with a pressure-sensitive adhesive25 such as that manufactured by National Adhesives and knowncommercially as #3655. Or, the same may be applied to the undersurfaceof the flange of said portion 22 (not shown), whereby member 29 may beunited variously to close the mouth to the desired adjustment of opening(Fig. 2 of the drawings) by exerting manually moderate pressure upon theflange of said portion 22 overlapping. The bag is then read3 to befitted to the particular tank (not shown) for use; and when filled isdisposed of and replaced.

To expedite the fitting, it is preferred to corrugate the portion ofmember 24} below its flange, in order to reduce the effectivecircumference at the lower edge thereof, and more especially by makingsaid corrugations wider and deeper toward said lower edge.

I claim:

1. A bag of the nature set forth, having an infold gusset portionextending from its bottom substantially to the top edge; and a seatingmember of relatively stiff material attached to the bag at its top edgeand along the inner face of the bag, said member being flanged abovesaid edge with the flanged portion extending outwardly over the edge toafiord in the use of the bag a support therefor, and the said seatingmember being interrupted substantially at the infolded portion andhaving an unattached end portion overlapping the attached edge portionwhereby an adjustment of the mouth opening over substantiallyone-half-the width of the infold portion is possible, and the saidunattached portion of the member being adapted to overlap the juxtaposedattached portion over its exposed upper flange surface which is coatedwith a pressure-sensitive adhesive for securing of the unattachedportion variously to the upper juxtaposed surface of the seating memberto maintain the selected bag opening thereat.

2. A bag according to claim 1, provided with two oppositely disposedlateral infolds, and wherein the mouth of the bag is substantiallycircular and the seating member substantially annular.

3. A bag according to claim 1, wherein the seating member extends at oneend to one of the outer fold lines of the infold and at its other end isattached to the bag only up to substantially the intermediate inner foldline of the infold, the unattached portion being of a length greaterthan the width of the free edge of the bag between the said one outerfold line of the infold and its intermediate line of fold.

4. A bag according to claim 1, wherein the seating member beneath theflange is corrugated substantially vertically to reduce thecircumference of the bottom edge.

5. A bag according to claim 4, wherein the corrugations are tapered inbeing wider and deeper toward the bottom edge.

Wolf Sept. 24, 1940 Osterdahl Dec. 17, 1940

